Swivel for telephone receivers



March 1927' H. F. TIROMFETEFQ E AL 'swivm m TELEPHONE RECEIVERS FiledAug. 27. 1925 )(znmw 1-7 WOMPETER JOHN P BROWN.

Patented Mar. 15, 1927.

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HERMAN TROMPETER AND JOHN 1?. BROWN, OF TOPEKA, KANSAS.

SWIVEL FQR rntnrnonn .enenrvuns.

.Anplication filed. August 27, 1925. serial No. 52,796.

Our invention relates to a. swivel for telephone receivers, and has forits chief ob ect a mechanisinthat willprevent the receiver cord frombeing, twisted}, causing undue wear thereof.

The mechanism herein disclosed consists of an attachment that can beapplied to an ordinary telephone receiver without in uring the part towhich it is attached.

Referring. tov the. drawings: Fig. 1 is nenlanged elevation of anordinary telephone receiver equipped with my device, partly in sectionfor convenience of illustration.

Fig. 2 is a plan view of the attachment.

Fig. 3 is a plan view of the insulation cap.

Fig. 4 is a plan view of the metal housing.

Fig.5 is a plan view of the rotatable member.

Fig. 6 is a bottom plan View of the metal housing head.

In Fig. 1, 1 is the housing of the telephone receiver, 2 is the magnetcontained therein. To attach our invention we cut out the top of thehousing large enough to receive a metal housing 3, the said housingbeing annular in shape and threaded on the exterior as at A and A, thelatter being adapted to screw into the cord receiving end of the housing1 as shown in Fig. 1. On the opposite end we have provided an insulationcap 4, same being threadedly connected to the housing as at Afunctioning as insulation for the metal parts hereinafter described, andthe said cap joins snugly to the end of the receiver housing as at B.

As an accurate means for the positioning of the metal housing 3 withinthe cap 1 We have provided an annular tongue 5 integral with saidhousing 3, the said tongue functioning as a stop engaging on the cordreeeiving end of the phone receiver housing and in a groove C in cap 4.

Ahead 6 threadedly engages into the end of the metal housing 3.Concentrieally positioned therein is a binding post 8, the said postbeing separated from the head by insulation 7. The said post connectswith one side of the magnet as at D and the other side E connects withthe head as at F.

In the opposite end of housing 3 is a member 9, said member is adaptedto rotate in said housing having its bearing on an annular flange as at10. The said member extending outward engages through the apertures 11and 12, said apertures being centrally disposed in the housing 3 and cap4. The said rotatablemeinber has an aperture 13 adapted to receive theend of the phone receiver cord, one line of said cord closing thecircuit with E of the magnet through the medium of housing 3' heretoforedescribed; The adjacent line connects to binding posts as at H closingthe circuit through a coil spring 1 1 which is pivotally seated on thebinding post 8 which connects with the magnet line D. The springfunctions also as tensioning means for the swivel engagement on theannular flange 10. The said flange being narrow at its point of contactreduces the friction so that the said member 9 will revolve easily.

It will be understood that the insulation member 15 is firmly attachedto the inner end member 9 by means of screws as shown at 16 and rotateswith said member. The spring being the circuit closing means during therotations.

Our invention may be applied to other parts of the phone system wherecords or other connecting means are employed, and where cords and othermeans may connect to light fixtures or electric-heaters of anydescription. The swivel will function to the same purpose as herein setforth.

Such modifications may be employed as lie within the scope of theappended claims.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent is 1. In a swivel for a telephone receiver, incombination with a telephone, a housing threadedly connected to theouter end of the receiver, a rotatable member engaging in the housing, acap threadedly engaging on the outer end of the housing, a receivingcord attached to the rotatable member, a spring tensioning means betweenthe housing and the rotatable member for contact of said members, and tofunction as circuit closing means between the telephone and thereceiver.

2. In a swivel for a telephone receiver, in combination with a telephonereceiver, a flanged housing attached to the cord receiving end of thereceiver, an annular tongue concentrically positioned on the peripherythereof as separating means from the ends when threadedly engaging inthe end of the receiver, a cap threadedly engaging on the outer end ofthe first said housing seating on the tongue in the end of the receiver,a

head for the housing threadedly engaging therein, a cord receivingmember rotatably engaging in the housing functioning as an electriccontact closing the circuit between the telephone and the receiver, amember closing the inner end of the rotatable member, a spring axiallypositioned and carried by said member functioning as a tensioning meansfor the engagement of the cord receiving member with the housing forcontinuous contact during rotations.

3. In a swivel for a telephone receiver, in combination with theelectric Wiring in the receiver, a housing threadedly engaging in thecord receiving end of the receiver, a head threadedly engaging in theinner end of the housing, an insulated binding post axi' ally positionedin the head functioning as a pivot bearing at the inner end, and theouter end as a binding means for one side of the circuit, a binding postconnecting to the head as a circuit closing means for the other side ofthe circuit, an inwardly eX- tending annular flange on the opposite endof the housing from the head, a rotatable cord receiving member havingan outwardly extending flange on the inner end thereof to contact Withthe said flange, a member to close the inner end of said rotatablemember, a spring tensioning means attached tolast said member, theopposite end of the spring pivotally engaging on the insulated bindingpost as circuit closing means be tween the housing and the rotatablememher, an apertured cap threadedly engaging on the cord receiving endof the receiver housing, all as, and for the purpose de scribed.

HERMAN F. TROMPETER. JOHN P. BROWN.

